JP2012154065A - Opening/closing detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly accurately detect an opening/closing state of an opening/closing body, which is capable of being configured by a fixed unit as well as a movable unit, regardless of a distance or a direction between the fixed unit and the movable unit.SOLUTION: An opening/closing body comprises: a fixed unit arranged at a fixed section of an opening/closing body; and a movable unit arranged at a movable section of the opening/closing body supported by the fixed section. The movable unit has a magnetic field generation section. The fixed unit has a plurality of magnetic field detection sections to detect a magnetic field generated by the magnetic field generation section of the movable unit and an opening/closing state determination section to determine an opening/closing state of the opening/closing body in accordance with respective output voltages based on the respective magnetic fields detected by the plurality of the magnetic field detection sections.

Description

  The present invention relates to an open / close detection device that detects an open / closed state of an open / close body exemplified by a door, a door, or a window.

  In recent years, open / close detection for detecting the open / closed state of an open / close body, such as a door, door or window, as a measure for improving the high level of safety and security in a house or office building, etc. Sensors are often attached. Limit switches or magnet switches have been mainly used for such open / close detection sensors.

  The limit switch is a contact-type detector that operates the actuator by the movement of the opening / closing body that is the operation target, and transmits the movement of the actuator to the microswitch to open / close the electrical circuit of the opening / closing body. It is. The limit switch is used for detecting the position of the opening / closing body.

  The magnet switch is a non-contact type detector, and is provided, for example, on an openable / closable body that can be configured by a movable unit and a fixed unit. For example, the magnet switch is provided with a reed switch portion in the fixed unit and a magnet portion that is a permanent magnet in the movable unit. A reed switch part is comprised with a single magnetic sensor element, and detects the magnetic force line (magnetic field) generated by the permanent magnet which comprises a magnet part.

  The magnet switch controls the opening / closing operation of the switching body by closing the contact when the reed switch detects the magnetic field of the magnet and opening the contact when the magnetic field of the magnet is no longer detected (for example, patents) Reference 1). In this case, in the closed state of the opening / closing body, the permanent magnet of the movable unit and the single magnetic sensor element of the fixed unit are arranged to face each other.

Japanese Patent Laying-Open No. 2005-36476 (paragraph 0005)

  However, in the conventional magnet switch described above, only a single magnetic sensor element is provided in the fixed unit. Therefore, as shown in FIG. 14, the magnetic sensor element Sz detects the magnetic field from the permanent magnet PMz according to the physical distance between the magnetic sensor element Sz of the fixed unit Fz and the permanent magnet PMz of the movable unit Mz. There is a problem that accuracy deteriorates.

  FIG. 14 is an explanatory diagram when detecting the open / close state of the open / close body in the conventional magnet switch. FIG. 9A is an explanatory diagram showing a state before the movable unit Mz slides. FIG. 4B is an explanatory diagram showing a state after the sliding operation of the movable unit Mz. In FIG. 14, the magnetic sensor element Sz is disposed at the central portion of the fixed portion Fz in order to easily detect the magnetic field lines (magnetic field) radiated from the permanent magnet PMz.

  In the state of FIG. 14A, the magnetic sensor element Sz can detect the magnetic lines of force (magnetic field) radiated from the permanent magnet PMz. However, in the state of FIG. 14B, when the movable part Mz performs a slide operation or a rotation operation, the magnetic field in the magnetic sensor element Sz depends on the physical distance or direction between the permanent magnet PMz and the magnetic sensor element Sz. In some cases, the detection accuracy of the camera deteriorated.

  Further, as shown in FIG. 15B, consider a case where the arrangement location of the magnetic sensor elements in the fixed unit Fz is shifted from the central portion. FIG. 15 is an explanatory diagram for detecting an open / close state of an open / close body in a conventional magnet switch. FIG. 9A is an explanatory diagram showing a state before the movable unit Mz slides. FIG. 4B is an explanatory diagram showing a state after the sliding operation of the movable unit Mz. In FIG. 15, the magnetic sensor element Sz is arranged not in the central portion of the fixed portion Fz but in the vicinity of the end portion of the fixed portion Fz.

  In the state of FIG. 15A, the magnetic sensor element Sz can detect the lines of magnetic force (magnetic field) radiated from the permanent magnet PMz, as in the state shown in FIG. However, in the state of FIG. 15B, when the movable unit Mz is slid or rotated, the magnetic field in the magnetic sensor element Sz depends on the physical distance or direction between the permanent magnet PMz and the magnetic sensor element Sz. In some cases, the detection accuracy of the camera deteriorated.

  The present invention has been made in view of the above-described circumstances, and in an openable / closable body that can be configured by a fixed unit and a movable unit, the open / closed state of the openable / closable body regardless of the distance or direction between the fixed unit and the movable unit. It is an object of the present invention to provide an open / close detection device that detects a high accuracy.

  In order to solve the above-described problems, an open / close detection device of the present invention includes a fixed unit provided in a fixed part of the open / close body and a movable unit provided in a movable part of the open / close body supported by the fixed part. The movable unit includes a magnetic field generation unit, and the fixed unit is detected by a plurality of magnetic field detection units that detect a magnetic field from the magnetic field generation unit of the movable unit and a plurality of magnetic field detection units. An open / close state determination unit that determines an open / close state of the open / close body in accordance with each output voltage based on each magnetic field.

  Further, the present invention is the above-described open / close detection device, wherein the plurality of magnetic field detection units are arranged perpendicular to the magnetization direction of the magnetic field from the magnetic field generation unit of the movable unit. .

  Further, the present invention is the above-described open / close detection device, wherein the fixed unit compares a difference between output voltages based on each magnetic field detected by each of the plurality of magnetic field detectors with a predetermined threshold voltage. And an open / close state determination unit that determines that the open / close body is in a closed state when it is determined that the difference between the output voltages exceeds a predetermined threshold voltage.

  Further, the present invention is the above-described open / close detection device, wherein the open / close state determination unit determines that the open / close body is in the open state when it is determined that the difference between the output voltages is less than a predetermined threshold voltage. It is characterized by doing.

  Further, the present invention is the above-described open / close detection device, wherein the fixed unit moves indicating a relationship between a moving amount of the movable unit and a difference between output voltages based on each magnetic field detected by the plurality of magnetic field detection units. The amount of movement of the movable unit corresponding to the difference between the output voltages calculated by the voltage difference comparison unit is estimated based on the first memory unit that stores the amount information and the amount of movement information stored in the first memory unit. And a movement amount estimation unit.

  The present invention is the above-described open / close detection device, wherein the magnetic field generation unit is a permanent magnet.

  Further, the present invention is the above-described open / close detection device, wherein the magnetic field generation unit is an electromagnet, and the movable unit is an electric lock unit that controls locking or unlocking of the opening / closing body when the opening / closing body is in a closed state. A second memory unit that stores locking / unlocking state information indicating a locking / unlocking state of the opening / closing body locked or unlocked by the electric lock unit, an electromagnet control unit that controls operation of the electromagnet, and a second memory unit And a signal processing unit that controls the electromagnet control unit according to the signal waveform corresponding to the unlocking / unlocking state information according to the stored locking / unlocking state information, and the fixing unit is locked or unlocked by the electric lock unit. A signal waveform corresponding to the unlocking / unlocking state information is extracted based on the third memory unit storing a signal waveform corresponding to the unlocking / unlocking state of the opened / closed body and each magnetic field detected by each of the plurality of magnetic field detecting units. Stores in signal extractor and third memory Based on in which signal waveform is characterized by further having an electric lock unlocking state determining unit determines unlocking state of the closing member corresponding to the extracted signal waveform by the signal extracting unit.

  Further, the present invention is the above-described open / close detection device, wherein the fixed unit further includes a wireless communication unit, and the wireless communication unit opens and closes the open / close body when it is determined that the open / close body is closed. When the state determination is completed, the signal processing unit transmits to the movable unit, and the signal processing unit starts the control of the electromagnet control unit when the wireless communication unit receives the determination of the opening / closing state of the opening / closing body. Features.

  In addition, the present invention is the above-described open / close detection device, characterized in that a magnetic material is disposed in the vicinity of each of the plurality of magnetic field detection units.

  According to the present invention, in an opening / closing body that can be configured by a fixed unit and a movable unit, the open / closed state of the opening / closing body can be detected with high accuracy regardless of the distance or direction between the fixed unit and the movable unit.

Explanatory drawing which shows an example of the mode of the closed state of the opening-closing body to which the opening / closing detection apparatus of 1st Embodiment was attached. Explanatory drawing which shows an example of the mode of the open state of the opening / closing body to which the opening / closing detection apparatus of 1st Embodiment was attached. Explanatory drawing which shows another example of the mode of the closed state of the opening-closing body to which the opening / closing detection apparatus of 1st Embodiment was attached. Explanatory drawing which shows another example of the state of the open state of the opening-closing body to which the opening / closing detection apparatus of 1st Embodiment was attached. The block diagram which shows the internal structure of the fixed unit and movable unit which comprise the opening / closing detection apparatus of 1st Embodiment. Explanatory drawing which showed the relationship between the rotation angle of a movable unit, and each output voltage based on the magnetic field detected by each magnetic sensor element of a fixed unit An explanatory view showing an outline of detection of an open / closed state of a fixed unit according to a rotation angle of the movable unit, (a) an explanatory view when the movable unit rotates counterclockwise, and (b) a movable unit rotated clockwise. Illustration of the case Explanatory drawing which shows the outline | summary of the detection of the opening / closing state of a fixed unit according to the sliding direction of a movable unit, (a) When a movable unit slides to the left side toward a fixed unit, (b) A movable unit faces toward a fixed unit When sliding to the right The block diagram which shows the internal structure of the fixed unit and movable unit which comprise the opening / closing detection apparatus of the modification of 1st Embodiment. The block diagram which shows the internal structure of the fixed unit and movable unit which comprise the opening / closing detection apparatus of 2nd Embodiment. Explanatory drawing which shows an example of the signal waveform of the locking / unlocking state information indicating the locking / unlocking state of the door 200 controlled by the electric lock unit 8A, (a) the signal waveform indicating that the door controlled by the electric locking unit is in the locked state, (B) A signal waveform indicating that the door controlled by the electric lock portion is unlocked. Sequence diagram showing the operation of the open / close detection device of the second embodiment The block diagram which shows the internal structure of the fixed unit and movable unit which comprise the opening / closing detection apparatus of the modification of 2nd Embodiment. Explanatory diagram when detecting the open / closed state of the open / close body in the conventional magnet switch, (a) explanatory diagram showing the state before the sliding operation of the movable unit, (b) explanatory diagram showing the state after the sliding operation of the movable unit Explanatory diagram when detecting the open / closed state of the open / close body in the conventional magnet switch, (a) explanatory diagram showing the state before the sliding operation of the movable unit, (b) explanatory diagram showing the state after the sliding operation of the movable unit

  Hereinafter, each embodiment of the present invention will be described with reference to the drawings. Further, in each embodiment described later, as exemplified by a window, a door, a door, or the like, a “fixing unit” includes a fixed unit and a movable unit, and the movable unit opens and closes away from the fixed unit. It is defined as The open / close detection device according to the present invention is attached to an open / close body.

  In each embodiment described below, a state where the opening / closing body is open is referred to as an “open state”, and a state where the opening / closing body is closed is referred to as a “closed state”.

  In each embodiment described later, the movable unit is provided in a movable part of an opening / closing body composed of a fixed part and a movable part, and constitutes an opening / closing detection device. Similarly, a fixed unit is provided in the fixed part of the opening-closing body comprised by a fixed part and a movable part, and comprises an opening / closing detection apparatus.

(First embodiment)
In the open / close detection device of the first embodiment, the fixed unit has a plurality of magnetic field detection units, and detects a magnetic field from a permanent magnet as a magnetic field generation unit provided in the movable unit, based on the magnetic field. The open / close state of the opening / closing body is determined according to the output voltage.

  As shown in FIG. 1 or FIG. 2, the open / close detection device 20 of the first embodiment is attached to an open / close body K that can be configured by a door frame 100 as a fixed portion and a door 200 as a movable portion. FIG. 1 is an explanatory diagram illustrating an example of a closed state of the opening / closing body K to which the opening / closing detection device 20 according to the first embodiment is attached. FIG. 2 is an explanatory diagram illustrating an example of an open state of the opening / closing body K to which the opening / closing detection device 20 according to the first embodiment is attached.

  As shown in FIG. 1 or 2, the open / close detection device 20 includes a fixed unit 20 </ b> B provided in the right side area of the door frame 100 of the open / close body K and a movable unit provided in the right side area of the door 200, for example. 20A. The door 200 is supported on the door frame 100 through a hinge 30 so as to be opened and closed.

  As shown in FIG. 3 or 4, the open / close detection device 20 may be attached to a sliding door type open / close body L exemplified by a window or the like. FIG. 3 is an explanatory diagram illustrating another example of a closed state of the opening / closing body L to which the opening / closing detection device 20 of the first embodiment is attached. FIG. 4 is an explanatory diagram illustrating another example of the open state of the opening / closing body L to which the opening / closing detection device 20 of the first embodiment is attached.

  As shown in FIG. 3 or 4, the open / close detection device 20 is provided in a fixed unit 20 </ b> B provided in, for example, the right side area of the window frame 300 as a fixed part, and in a right side area of the sash 400 as a movable part. And the movable unit 20A. The sash 400 is provided so as to be slidable in the left-right direction on the paper surface along the window frame 300.

  In each of the following embodiments, it is assumed that the opening / closing body to which the opening / closing detection device according to the present invention is attached is the opening / closing body K constituted by the door frame 100 and the door 200 shown in FIGS. In addition, regarding description of the opening-closing body L, FIG.3 and FIG.4 is referred as needed.

  The configuration of the open / close detection device 20 will be described with reference to FIG. FIG. 5 is a block diagram showing an internal configuration of the fixed unit 20B and the movable unit 20A that constitute the open / close detection device 20 of the first embodiment.

  As shown in FIG. 5, the movable unit 20A has a permanent magnet 1A as a magnetic field generator for generating a magnetic field with respect to the fixed unit 20B. Since the movable unit 20A has the permanent magnet 1A as the magnetic field generation unit, it is not necessary to provide a wired power supply facility as the magnetic field generation unit, and the wiring of the movable unit 20A is simplified.

  Furthermore, according to the movable unit 20A, by having the permanent magnet 1A as the magnetic field generation unit, the disconnection of the wiring that occurs due to the increase in the number of times of opening and closing the opening and closing body K is reduced, and the appearance of the movable unit 20A is impaired. There is also an effect that nothing is lost.

  As shown in FIG. 5, the fixed unit 20B includes a plurality of, for example, two magnetic sensor elements 5B1 and 5B2, a voltage difference comparison unit 6B, a threshold voltage holding unit 7B, and an open / close state determination unit 8B.

  The magnetic sensor elements 5B1 and 5B2 are composed of, for example, Hall elements or MR (magneto resistance) elements, and detect magnetic lines of force (magnetic fields) emitted by the permanent magnet 1A of the movable unit 20A. The magnetic sensor elements 5B1 and 5B2 output each output voltage based on the detected magnetic field to the voltage difference comparison unit 6B.

  The magnetic sensor elements 5B1 and 5B2 are preferably arranged so as to be arranged perpendicular to the magnetization direction of the magnetic field generated based on the permanent magnet 1A of the movable unit 20A. The arrangement of the magnetic sensor elements 5B1 and 5B2 is the same in the embodiments described later.

  Accordingly, the opening / closing detection device 20 uses a plurality of magnetic sensor elements, so that the opening / closing body K is more effective than the conventional opening / closing detection device using a single magnetic sensor element even when the movable unit 20A rotates or slides. Can be detected with high accuracy.

  The voltage difference comparison unit 6B is configured by a comparator circuit, and inputs the signal waveform of each output voltage output by the magnetic sensor elements 5B1 and 5B2. The voltage difference comparison unit 6B calculates a difference between the input output voltages, and further calculates a difference between the calculated output voltages and a predetermined threshold voltage held in advance by the threshold voltage holding unit 7B. Compare. The voltage difference comparison unit 6B outputs a signal corresponding to the comparison result to the open / close state determination unit 8B.

  The result of the comparison by the voltage difference comparison unit 6B is a result that the difference between the output voltages is larger than the predetermined threshold voltage or a result that the difference between the output voltages is smaller than the predetermined threshold voltage.

  The predetermined threshold voltage held in advance in the threshold voltage holding unit 7B is a threshold that determines whether or not the opening / closing body K is in an open state or a closed state. This predetermined threshold voltage can be arbitrarily set.

  As shown in FIG. 6, when the difference between the output voltages output by the magnetic sensor elements 5B1 and 5B2 is larger than the predetermined threshold voltage, the open / close body K is in an open state. Similarly, when the difference between the output voltages output by the magnetic sensor elements 5B1 and 5B2 is smaller than the predetermined threshold voltage, the opening / closing body K is in a closed state. FIG. 6 is an explanatory diagram showing the relationship between the rotation angle of the movable unit 20A and the output voltages based on the magnetic fields detected by the magnetic sensor elements 5B1 and 5B2 of the fixed unit 20B.

  The open / close state determination unit 8B receives a signal corresponding to the comparison result output by the voltage difference comparison unit 6B. The open / close state determination unit 8B determines the open / close state of the open / close body K according to the input signal.

  Specifically, the open / close state determination unit 8B determines that the difference between the output voltages output from the magnetic sensor elements 5B1 and 5B2 is greater than the predetermined threshold voltage in accordance with the signal output from the voltage difference comparison unit 6B. The open / close body K is determined to be in the open state.

  In addition, the open / close state determination unit 8B determines that the difference between the output voltages output from the magnetic sensor elements 5B1 and 5B2 is smaller than the predetermined threshold voltage in accordance with the signal output from the voltage difference comparison unit 6B. The open / close body K is determined to be closed.

  In the open / close detection device 20 of the first embodiment, when the fixed unit 20B detects a magnetic field from the permanent magnet 1A provided in the movable unit 20A, the open / close body is opened or closed according to the output voltage based on the magnetic field. Determine the state.

  FIG. 7 is an explanatory diagram showing an outline of detection of the open / closed state of the fixed unit 20B according to the rotation angle of the movable unit 20A. FIG. 6A is an explanatory diagram when the movable unit 20A rotates counterclockwise. FIG. 4B is an explanatory diagram when the movable unit 20A rotates clockwise.

  FIG. 8 is an explanatory diagram showing an outline of detection of the open / closed state of the fixed unit 20B according to the sliding direction of the movable unit 20A. FIG. 5A shows the case where the movable unit 20A slides to the left side toward the fixed unit 20B. FIG. 5B shows a case where the movable unit 20A slides to the right side toward the fixed unit 20B.

  As shown in FIGS. 7A and 7B, even when the movable unit 20A is rotated so as to move away from the fixed unit 20B, the fixed unit 20B may be one of a plurality of, for example, two magnetic sensor elements 5B1 and 5B2. Detects the magnetic field from the permanent magnet 1A.

  As shown in FIGS. 8A and 8B, even when the movable unit 20A slides away from the fixed unit 20B, the fixed unit 20B may be one of a plurality of, for example, two magnetic sensor elements 5B1 and 5B2. Detects the magnetic field from the permanent magnet 1A.

  Thereby, the open / close detection device 20 increases the open / close state of the open / close body K in the open / close body K that can be configured by the fixed unit 20B and the movable unit 20A regardless of the distance or direction between the fixed unit 20B and the movable unit 20A. It can be detected with accuracy.

(Modification of the first embodiment)
As shown in FIG. 9, the fixed unit 20Ba of the open / close detection device 20a may further include a movement amount estimation unit 9B and a memory unit 10B. FIG. 9 is a block diagram illustrating an internal configuration of the fixed unit 20Ba and the movable unit 20Aa that configure the open / close detection device 20a according to the modification of the first embodiment.

  The fixed unit 20Ba includes magnetic sensor elements 5B1 and 5B2, a voltage difference comparison unit 6Ba, a threshold voltage holding unit 7B, an open / close state determination unit 8B, a movement amount estimation unit 9B, and a memory unit 10B. In FIG. 5, the same reference numerals are given to components that perform the same configuration and operation as the fixed unit 20 </ b> B of the open / close detection device 20 of the first embodiment. In the following description, description of the same configuration and operation as the fixed unit 20B of the open / close detection device 20 of the first embodiment will be omitted, and the configuration and operation different from the fixed unit 20B will be described.

  The voltage difference comparison unit 6Ba receives the signal waveform of each output voltage output by the magnetic sensor elements 5B1 and 5B2. The voltage difference comparison unit 6Ba calculates the difference between the input output voltages, and further calculates the difference between the calculated output voltages and the predetermined threshold voltage held in advance by the threshold voltage holding unit 7B. Compare. The voltage difference comparison unit 6Ba outputs a signal corresponding to the comparison result to the open / close state determination unit 8B.

  Further, the voltage difference comparison unit 6Ba outputs a signal corresponding to the calculated difference between the output voltages to the movement amount estimation unit 9B.

  The movement amount estimation unit 9B receives the signal output from the voltage difference comparison unit 6Ba. The movement amount estimation unit 9B estimates the movement amount of the fixed unit 20Ba according to the signal input from the voltage difference comparison unit 6Ba based on the movement amount information (see later) stored in the memory unit 10B. This movement amount indicates a distance or a rotation angle at which the movable unit 20Aa is rotated or slid so that the movable unit 20Aa is separated from the fixed unit 20Ba, with the opening / closing body K being in the closed state.

  The memory unit 10B stores movement amount information indicating the relationship between the difference between the output voltages output by the magnetic sensor elements 5B1 and 5B2 and the movement amount of the movable unit 20Aa.

  The opening / closing detection device 20a estimates the moving amount of the movable unit 20Aa even when the construction state of the movable unit 20Aa and the fixed unit 20Ba attached to the opening / closing body K is poor. Thereby, according to the opening / closing detection apparatus 20a, the opening / closing state of the opening / closing body K can be detected with higher accuracy than the opening / closing detection apparatus 20 of the first embodiment.

(Second Embodiment)
In the open / close detection device of the second embodiment, the fixed unit has a plurality of magnetic field detection units, and when a magnetic field from an electromagnet serving as a magnetic field generation unit provided in the movable unit is detected, an output based on the magnetic field is performed. The open / close state of the open / close body is determined according to the voltage.

  Furthermore, in the open / close detection device of the second embodiment, after the open / close body is determined to be in the closed state, the movable unit is unlocked / unlocked of the door 200 controlled by the electric lock portion 8A attached to the movable unit. Is transmitted to the fixed unit using the magnetic field generator. The fixed unit receives the locking / unlocking state of the door 200 controlled by the electric lock unit 8A from the movable unit, and then determines the locking / unlocking state of the door 200 controlled by the electric lock unit 8A.

  FIG. 10 is a block diagram showing an internal configuration of the fixed unit 20Bb and the movable unit 20Ab that constitute the open / close detection device 20b of the second embodiment.

  The movable unit 20Ab includes a signal processing unit 2A, a memory unit 3A, an electromagnet control unit 4A, an electromagnet 5A, a wireless communication unit 6A, and an electric lock unit 8A.

  Since the signal processing unit 2A determines the open / closed state of the open / close body K between the fixed unit 20Bb and the movable unit 20Ab, the electromagnet 5A radiates a magnetic field line (magnetic field) at predetermined intervals. Necessary excitation current is passed through the electromagnet controller 4A. The electromagnet control unit 4A causes the fixed unit 20Bb to emit magnetic lines of force using the electromagnet 5A based on the excitation current from the signal processing unit 2A.

  When the signal processing unit 2A receives the opening / closing state information indicating that the opening / closing body K is in the closed state from the fixed unit 20Bb, the signal processing unit 2A shows the unlocking / unlocking state indicating the locking / unlocking state of the door 200 of the opening / closing body K controlled by the electric lock unit 8A. The state information is read from the memory unit 3A.

  The signal processing unit 2A controls the electromagnet control unit 4A so as to emit magnetic lines of force (magnetic field) from the electromagnet 5A according to the read lock / unlock state information. Specifically, the signal processing unit 2A causes the electromagnet 5A to emit magnetic lines of force (magnetic field) during a period in which the bit string is 1 according to the bit string (see FIG. 11) of the locking / unlocking state information read from the memory unit 3A. The excitation current necessary for the flow is passed through the electromagnet control unit 4A.

  The memory unit 3A stores lock / unlock state information indicating a lock / unlock state of the door 200 controlled by the electric lock unit 8A attached to the movable unit 20Ab.

  The electromagnet control unit 4A is configured by a transistor, a thyristor, or the like. When the excitation current from the signal processing unit 2A flows in, the electromagnet control unit 4A causes the electromagnet 5A to emit magnetic lines of force (magnetic field) by flowing the current.

  The electromagnet 5A radiates lines of magnetic force (magnetic field) to the fixed unit 20Bb in accordance with the current from the electromagnet controller 4A. As a result, a magnetic field is generated around the movable unit 20Ab.

  For example, when the electromagnet control unit 4A is composed of a transistor, the excitation current from the signal processing unit 2A flows into the gate terminal of the electromagnet control unit 4A, and the collector-emitter of the electromagnet control unit 4A becomes conductive. As a result, a current flows through the electromagnet 5A via the electromagnet controller 4A, and as a result, the electromagnet 5A radiates magnetic lines of force (magnetic field).

  The wireless communication unit 6A performs wireless communication with the wireless communication unit 14B of the fixed unit 20Bb via the antenna 7A. The wireless communication unit 6A receives opening / closing state information including a result of determining the opening / closing state of the opening / closing body K from the wireless communication unit 14B. The wireless communication unit 6A outputs the open / close state information to the signal processing unit 2A.

  The electric lock portion 8A is attached to the movable unit 20Ab, and controls the operation of locking or unlocking the door 200 of the opening / closing body K between the door frame 100 and the door 200 when the opening / closing body K is in the closed state. To do. The electric lock unit 8 </ b> A is locked / unlocked state information indicating the locked or unlocked state of the door 200 when the door 200 is locked or unlocked between the door frame 100 and the door 200. Is written in the memory unit 3A. Thereby, the memory unit 3A stores the locking / unlocking state information indicating the locking / unlocking state of the door 200 controlled by the electric lock unit 8A.

  The fixed unit 20Bb includes magnetic sensor elements 5B1 and 5B2, a voltage difference comparison unit 6B, a threshold voltage holding unit 7B, an open / close state determination unit 8Bb, a signal extraction unit 11B, an electric lock / unlock state determination unit 12B, a memory unit 13B, and wireless communication. Part 14B.

  In FIG. 10, the same reference numerals are given to the same components and operations as those of the fixed unit 20 </ b> B of the open / close detection device 20 of the first embodiment. In the following description, description of the same configuration and operation as the fixed unit 20B of the open / close detection device 20 of the first embodiment will be omitted, and the configuration and operation different from the fixed unit 20B will be described.

  The open / close state determination unit 8Bb inputs a signal corresponding to the comparison result output by the voltage difference comparison unit 6B. The open / close state determination unit 8B determines the open / close state of the open / close body K according to the input signal.

  Specifically, the open / close state determination unit 8Bb determines that the difference between the output voltages output from the magnetic sensor elements 5B1 and 5B2 is greater than the predetermined threshold voltage in accordance with the signal output from the voltage difference comparison unit 6B. The open / close body K is determined to be in the open state.

  When the difference between the output voltages output from the magnetic sensor elements 5B1 and 5B2 is smaller than the predetermined threshold voltage according to the signal output from the voltage difference comparison unit 6B, the open / close state determination unit 8Bb K is determined to be a closed state.

  Further, the open / close state determination unit 8Bb outputs the open / close state information including the open / close state of the open / close body K to the wireless communication unit 14B after determining the open / close state of the open / close body K.

  The signal extraction unit 11B is configured by a BPF (band pass filter) or LPF (Low pass filter) that can extract a component of a predetermined frequency band in an arbitrary signal waveform, and outputs an output voltage from the magnetic sensor elements 5B1 and 5B2. Input the signal waveform. The signal extraction unit 11B extracts a signal waveform of a desired output voltage from the signal waveform of the input output voltage.

  As a result, the fixed unit 20Bb improves the reproducibility of the output voltage based on the lines of magnetic force (magnetic field) generated by the electromagnet 5A even when the magnetic sensor elements 5B1 and 5B2 detect noise signals around the fixed unit 20Bb. Can do.

  The signal extraction unit 11B outputs the signal waveform of the extracted output voltage to the electric lock / unlock state determination unit 12B.

  Note that the signal extraction unit 11B may average the output voltages of the plurality of output voltages from, for example, two magnetic sensor elements 5B1 and 5B2, and output the averaged output voltage to the electric lock / unlock state determination unit 12B. Thereby, fixed unit 20Bb can determine with high accuracy the locking / unlocking state of door 200 controlled by electric lock 8A.

  The signal extraction unit 11B selects one of the output voltages from the plurality of output voltages from, for example, two magnetic sensor elements 5B1 and 5B2, and outputs the selected output voltage to the electric lock / unlock state determination unit 12B. Also good. Thereby, fixed unit 20Bb can determine with high accuracy the locking / unlocking state of door 200 controlled by electric lock 8A.

  The signal extraction unit 11B calculates the weighted average of each output voltage from a plurality of, for example, two magnetic sensor elements 5B1 and 5B2 by multiplying each output voltage by a predetermined weight, and then calculates the electric lock. You may output to the locking / unlocking state determination part 12B. Thereby, fixed unit 20Bb can determine with high accuracy the locking / unlocking state of door 200 controlled by electric lock 8A.

  In FIG. 10, the fixed unit 20Bb includes the signal extraction unit 11B, but may not include the signal extraction unit 11B. In this case, the signal waveform of the output voltage from the magnetic sensor elements 5B1 and 5B2 is output to the electric lock / unlock state determination unit 12B. Thereby, the circuit configuration of the fixed unit 20Bb can be simplified.

  The electric lock / unlock state determination unit 12B receives the signal waveform of the output voltage output by the signal extraction unit 11B. The electric lock / unlock state determination unit 12B refers to the signal waveform of the lock / unlock state of the door 200 controlled by the electric lock unit 8A from the memory unit 13A, and according to the signal waveform of the output voltage output by the signal extraction unit 11B. The locking / unlocking state of the door 200 controlled by the electric lock unit 8A is determined.

  The memory unit 13B stores a signal waveform indicating the locking / unlocking state of the door 200 controlled by the electric lock unit 8A as shown in FIG. FIG. 11 is an explanatory diagram illustrating an example of a signal waveform of the locking / unlocking state information indicating the locking / unlocking state of the door 200 controlled by the electric lock unit 8A. FIG. 4A is a signal waveform indicating that the door 200 controlled by the electric lock 8A is in a locked state. FIG. 5B is a signal waveform indicating that the door 200 controlled by the electric lock portion 8A is in an unlocked state.

  As shown in FIG. 11A, when the signal waveform extracted by the signal extraction unit 11B is the signal waveform P1, the electric lock locking / unlocking state determination unit 12B determines that the door 200 controlled by the electric lock unit 8A is Determined to be locked. Similarly, as shown in FIG. 11B, when the signal waveform extracted by the signal extraction unit 11B is the signal waveform P2, the electric lock / unlock state determination unit 12B is controlled by the electric lock unit 8A. It is determined that the door 200 is unlocked.

  The wireless communication unit 14B acquires the open / close state information output by the open / close state determination unit 8Bb. The wireless communication unit 14B transmits the open / close state information to the wireless communication unit 6A of the movable unit 20Ab via the antenna 15B.

  Next, the operation of the open / close detection device 20b of the second embodiment will be described with reference to FIG. FIG. 12 is a sequence diagram illustrating an operation of the open / close detection device 20b according to the second embodiment.

  Since the signal processing unit 2A determines the open / closed state of the open / close body K between the fixed unit 20Bb and the movable unit 20Ab, the electromagnet 5A radiates a magnetic field line (magnetic field) at predetermined intervals. Necessary excitation current is supplied to the electromagnet controller 4A (S11).

  The electromagnet control unit 4A causes the fixed unit 20Bb to emit magnetic lines of force using the electromagnet 5A based on the excitation current (S12).

  The magnetic sensor elements 5B1 and 5B2 detect the magnetic lines of force (magnetic field) radiated by the electromagnet 5A in step S12 (S13), and output each output voltage based on the detected magnetic field to the voltage difference comparison unit 6B.

  The voltage difference comparison unit 6B receives the signal waveform of each output voltage output by the magnetic sensor elements 5B1 and 5B2. The voltage difference comparison unit 6B calculates a difference between the input output voltages, and further calculates a difference between the calculated output voltages and a predetermined threshold voltage held in advance by the threshold voltage holding unit 7B. Compare (S14). The voltage difference comparison unit 6B outputs a signal corresponding to the comparison result to the open / close state determination unit 8Bb.

  The open / close state determination unit 8B receives a signal corresponding to the comparison result output by the voltage difference comparison unit 6B. The open / close state determination unit 8B determines the open / close state of the open / close body K according to the input signal (S15).

  Specifically, the open / close state determination unit 8Bb determines that the difference between the output voltages output from the magnetic sensor elements 5B1 and 5B2 is greater than the predetermined threshold voltage in accordance with the signal output from the voltage difference comparison unit 6B. The open / close body K is determined to be in the open state.

  In addition, the open / close state determination unit 8Bb, when the difference between the output voltages output by the magnetic sensor elements 5B1 and 5B2 is smaller than the predetermined threshold voltage according to the signal output by the voltage difference comparison unit 6B, The open / close body K is determined to be closed.

  After determining the opening / closing state of the opening / closing body K, the opening / closing state determination unit 8Bb outputs the opening / closing state information including the opening / closing state of the opening / closing body K to the wireless communication unit 14B.

  The open / close state information output by the open / close state determination unit 8Bb is acquired. The wireless communication unit 14B transmits the open / close state information to the wireless communication unit 6A of the movable unit 20Ab via the antenna 15B (S16).

  The wireless communication unit 6A performs wireless communication with the wireless communication unit 14B of the fixed unit 20Bb via the antenna 7A. The wireless communication unit 6A receives the open / close state information including the result of the determination of the open / close state of the open / close body K from the wireless communication unit 14B (S17). The wireless communication unit 6A outputs the open / close state information to the signal processing unit 2A.

  When the signal processing unit 2A receives the opening / closing state information indicating that the opening / closing body K is in the closed state from the fixed unit 20Bb (S17), the signal processing unit 2A indicates the locking / unlocking state indicating the locking / unlocking state of the door 200 controlled by the electric lock unit 8A. Information is read from the memory unit 3A (S18).

  The signal processing unit 2A controls the electromagnet control unit 4A to operate the electromagnet 5 according to the read lock / unlock state information. Specifically, the signal processing unit 2A is necessary for the electromagnet 5 to generate a magnetic field during the period when the bit string is 1 according to the bit string (see FIG. 11) of the locking / unlocking state information read from the memory unit 3A. Excitation current is passed through the electromagnet controller 4A (S19).

  The electromagnet controller 4A causes the fixed unit 20Bb to emit magnetic lines of force using the electromagnet 5A based on the excitation current from the signal processor 2A (S20).

  The magnetic sensor elements 5B1 and 5B2 detect the magnetic lines of force (magnetic field) emitted by the electromagnet 5A in step S20 (S21), and output each output voltage based on the detected magnetic field to the signal extraction unit 11B. The signal waveform of the output voltage input to the signal extraction unit 11B is different from the signal waveform of the output voltage with respect to the magnetic field detected in step S13.

  That is, the signal waveform of the output voltage input to the signal extraction unit 11B is a signal according to the bit string of the unlocking / unlocking state information indicating the locking / unlocking state of the door 200 controlled by the electric lock unit 8A, as in the signal waveform shown in FIG. This is the same as the signal waveform of the excitation current output from the processing unit 2A.

  The signal extraction unit 11B inputs the signal waveform of the output voltage from the magnetic sensor elements 5B1 and 5B2. The signal extraction unit 11B extracts a signal waveform of a desired output voltage from the signal waveform of the input output voltage (S22). The signal extraction unit 11B outputs the signal waveform of the extracted output voltage to the electric lock / unlock state determination unit 12B.

  The electric lock / unlock state determination unit 12B receives the signal waveform of the output voltage output by the signal extraction unit 11B. The electric lock locking / unlocking state determination unit 12B refers to the signal waveform indicating the locking / unlocking state of the door 200 controlled by the electric lock unit 8A from the memory unit 13B, and according to the signal waveform of the output voltage output by the signal extraction unit 11B. Then, the locking / unlocking state of the door 200 controlled by the electric lock unit 8A is determined (S23).

  In step S23 and subsequent steps, the signal processing unit 2A performs the operations in step S11 and subsequent steps for every predetermined period described above, and the operations in steps S11 to S23 are similarly repeated.

  As described above, the open / close detection device 20b is configured so that the open / close state of the open / close body K is the same regardless of the distance or direction between the fixed unit 20B and the movable unit 20A. Can be detected with high accuracy.

  Furthermore, according to the open / close detection device 20b, the locking / unlocking state information of the electric lock portion 8A attached to the movable unit 20Ab can be transmitted to the fixed unit 20Bb via the lines of magnetic force (magnetic field) radiated from the electromagnet 5A. it can. In this case, the open / close detection device 20b can grasp the locking / unlocking state information indicating the locking / unlocking state of the door 200 controlled by the transmitted electric lock portion 8A by the fixing unit 20Bb.

(Modification of the second embodiment)
In the second embodiment, the locking / unlocking state information indicating the locking / unlocking state of the door 200 controlled by the electric locking unit 8A attached to the movable unit 20Ab using the electromagnet control unit 4A and the electromagnet 5A is stored in the fixed unit 20Bb. The example transmitted to was explained.

  In the modification of the second embodiment, as shown in FIG. 13, information read by the reader unit 9A attached to the movable unit 20Ac for personal authentication is obtained using the electromagnet control unit 4 and the electromagnet 5. An example of transmission to the fixed unit 20Bb will be described. FIG. 13 is a block diagram illustrating an internal configuration of the fixed unit 20Bc and the movable unit 20Ac that constitute the open / close detection device 20c according to the modification of the second embodiment.

  The movable unit 20Ac includes a signal processing unit 2A, an electromagnet control unit 4A, an electromagnet 5A, a wireless communication unit 6A, and a reader unit 8A. In FIG. 13, the same reference numerals are given to components that perform the same configuration and operation as the fixed unit 20 </ b> Bb of the open / close detection device 20 b of the second embodiment. In the following description, description of the same configuration and operation as the fixed unit 20Bb of the open / close detection device 20b of the second embodiment will be omitted, and the configuration and operation different from the fixed unit 20Bb will be described.

  The reader unit 8A is attached to the movable unit 20Ac of the opening / closing body K near the entrance of an office building, factory, house, or the like, for example, and card information of a security card (eg, IC card, etc.) for personal authentication of employees, etc. Read. The reader unit 8A outputs the read card information to the signal processing unit 2A.

  The fixed unit 20Bc includes magnetic sensor elements 5B1 and 5B2, a voltage difference comparison unit 6B, a threshold voltage holding unit 7B, an open / close state determination unit 8Bc, a signal extraction unit 11B, a card information determination unit 12Bc, a memory unit 13Bc, and a wireless communication unit 14B. Have. In FIG. 13, the same reference numerals are given to components that perform the same configuration and operation as the fixed unit 20 </ b> Bb of the open / close detection device 20 b of the second embodiment. In the following description, description of the same configuration and operation as the fixed unit 20Bb of the open / close detection device 20b of the second embodiment will be omitted, and the configuration and operation different from the fixed unit 20Bb will be described.

  The signal waveform of the output voltage extracted by the signal extraction unit 11B is output to the card information determination unit 12Bc.

  The card information determination unit 12Bc receives the signal waveform of the output voltage output from the signal extraction unit 11B. The card information determination unit 12Bc refers to the signal waveform indicating the security card ID information from the memory unit 13Bc, and determines the security card ID information according to the signal waveform of the output voltage output by the signal extraction unit 11B.

  The memory unit 13Bc stores a signal waveform indicating the ID information of the security card as shown in FIG. For example, it is assumed that the signal waveform as shown in FIG. 11A or 11B is set in advance for each ID information of the security card.

  As shown in FIG. 11A, when the signal waveform extracted by the signal extraction unit 11B is the signal waveform P1, the card information determination unit 12Bc displays the ID information of the security card, for example, the employee A's It is determined as ID information. Similarly, as shown in FIG. 11B, when the signal waveform extracted by the signal extraction unit 11B is the signal waveform P2, the card information determination unit 12Bc displays the security card ID information, for example, an employee It is determined as Mr. B's ID information.

  Thereby, according to the open / close detection device 20c, the ID information of the security card read by the reader unit 9A attached to the movable unit 20Ac is transmitted to the fixed unit 20Bc via the magnetic lines (magnetic field) radiated from the electromagnet 5A. can do. In this case, the open / close detection device 20c can grasp the transmitted security card ID information by the fixed unit 20Bc.

  While various embodiments have been described with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  In each of the above-described embodiments, a magnetic material such as iron may be disposed in the vicinity of each of the magnetic sensor elements 5B1 and 5B2. Thereby, the permeance of the magnetic path of the magnetic field detected by each magnetic sensor element 5B1, 5B2 is improved, and the configuration of the magnetic field generating part (permanent magnet, electromagnet, etc.) of the movable unit can be simplified. For example, it is possible to reduce the size of the magnetic field generating unit in the movable unit, and to reduce the excitation current for generating the magnetic field.

  In addition, you may combine suitably the 2nd Embodiment mentioned above and the modification of 2nd Embodiment. Specifically, the movable unit 20Ab illustrated in FIG. 10 includes the reader unit 9A illustrated in FIG. Further, the fixed unit 20Bb shown in FIG. 10 includes a card information determination unit 12Bc and a memory unit 13Bc shown in FIG.

  In this case, the signal processing unit superimposes the bit string of the locking / unlocking state information indicating the locking / unlocking state of the door 200 controlled by the electric lock unit and the bit string of the ID information of the security card read by the reader unit. Further, the signal processing unit causes the exciting current to flow to the electromagnet control unit in a period in which the bit string of the superimposed signal is 1 in accordance with the bit string of the superimposed signal. Thereby, an electromagnet radiates a magnetic force line (magnetic field) based on the exciting current from a signal processing part.

  In the fixed unit, the radiated magnetic field lines (magnetic field) are detected, and the signal waveform of the output voltage based on the detected magnetic field is input to the signal extraction unit. The signal extraction unit refers to the bit string of the locking / unlocking state information indicating the locking / unlocking state of the door 200 controlled by the electric lock unit and the bit string of the security card ID information from each memory unit.

  Further, the signal extraction unit, from the input signal waveform, a bit string of the lock / unlock state information indicating the lock / unlock state of the door 200 controlled by the electric lock unit, and a bit string of the security card ID information read by the reader unit, Is extracted and separated. Both of the separated bit strings are output to the electric lock / unlock state determination unit and the card information determination unit.

  The electric lock locking / unlocking state determining unit and the card information determining unit are respectively input bit strings, and a bit string of locking / unlocking state information indicating the locking / unlocking state of the door 200 controlled by the electric lock unit stored in each memory unit, Refer to the bit string of the ID information of the security card. Further, the electric lock / unlock state determination unit determines the lock / unlock state of the door 200 controlled by the electric lock unit, and the card information determination unit determines the ID information of the security card read by the reader unit.

  As a result, the open / close detection device transmits the locking / unlocking state information indicating the locking / unlocking state of the electric lock unit and the security card ID information read by the reader unit to the fixed unit simultaneously using the electromagnet control unit and the electromagnet. And can grasp.

1A Permanent magnet 2A Signal processing unit 3A, 10B, 13B Memory unit 4A Electromagnet control unit 5A Electromagnets 5B1, 5B2 Magnetic sensor element 6B Voltage difference comparison unit 7B Threshold voltage holding unit 8B Open / close state determination unit 9B Movement amount estimation unit 11B Signal extraction unit 12B Electric lock / unlock state determination unit 6A, 14B Wireless communication unit 7A, 15B Antenna 20 Opening / closing detection device 20A, 20Aa, 20Ab Movable unit 20B, 20Ba, 20Bb Fixed unit 30 Hinges 100 Door frame 200 Door 300 Window frame 400 Sash K, L Opening and closing body P1, P2 Signal waveform

Claims (9)

An open / close detection device comprising a fixed unit provided in a fixed part of an open / close body and a movable unit provided in a movable part of an open / close body supported by the fixed part,
The movable unit has a magnetic field generator,
The fixing unit is
A plurality of magnetic field detectors for detecting a magnetic field from the magnetic field generator of the movable unit;
An open / close state detection device comprising: an open / close state determination unit that determines an open / close state of the open / close body according to each output voltage based on each magnetic field detected by the plurality of magnetic field detection units. The open / close detection device according to claim 1,
The plurality of magnetic field detection units are open / close detection devices arranged in a direction perpendicular to the magnetization direction of the magnetic field from the magnetic field generation unit of the movable unit. The open / close detection device according to claim 1 or 2,
The fixing unit is
A voltage difference comparison unit that compares a difference between output voltages based on each magnetic field detected by each of the plurality of magnetic field detection units and a predetermined threshold voltage;
The open / close state determination unit includes:
An open / close detection device that determines that the opening / closing body is in a closed state when it is determined that a difference between the output voltages exceeds the predetermined threshold voltage. The open / close detection device according to claim 3,
The open / close state determination unit includes:
An open / close detection device that determines that the open / close body is in an open state when it is determined that the difference between the output voltages is less than the predetermined threshold voltage. The open / close detection device according to any one of claims 1 to 4,
The fixing unit is
A first memory unit that stores movement amount information indicating a relationship between a movement amount of the movable unit and a difference between output voltages based on magnetic fields detected by the plurality of magnetic field detection units;
A movement amount estimation unit that estimates the movement amount of the movable unit corresponding to the difference between the output voltages calculated by the voltage difference comparison unit based on the movement amount information stored in the first memory unit; An open / close detection device further comprising: The open / close detection device according to any one of claims 1 to 5,
The magnetic field generator is an open / close detection device that is a permanent magnet. The open / close detection device according to any one of claims 1 to 5,
The magnetic field generator is an electromagnet,
The movable unit is
An electric lock portion for controlling locking or unlocking of the opening and closing body when the opening and closing body is in a closed state; and
A second memory unit for storing locking / unlocking state information indicating a locking / unlocking state of the opening / closing body locked or unlocked by the electric lock unit;
An electromagnet controller that controls the operation of the electromagnet;
A signal processing unit for controlling the electromagnet control unit according to a signal waveform corresponding to the locking / unlocking state information according to the locking / unlocking state information stored in the second memory unit;
The fixing unit is
A third memory unit for storing a signal waveform corresponding to a locking / unlocking state of the opening / closing body locked or unlocked by the electric lock unit;
Based on each magnetic field detected by each of the plurality of magnetic field detection units, a signal extraction unit that extracts a signal waveform corresponding to the locking / unlocking state information;
An electric lock locking / unlocking state determination unit for determining a locking / unlocking state of the opening / closing body corresponding to the signal waveform extracted by the signal extraction unit based on the signal waveform stored in the third memory unit; Opening and closing detection device having. The open / close detection device according to claim 7,
The fixed unit further includes a wireless communication unit,
The wireless communication unit
When it is determined that the opening / closing body is in a closed state, a message indicating that the determination of the opening / closing state of the opening / closing body is completed is transmitted to the movable unit,
The signal processing unit
An open / close detection device that starts control of the electromagnet control unit when the wireless communication unit receives a notification that the determination of the open / closed state of the open / close body has been completed. The open / close detection device according to any one of claims 1 to 8,
An open / close detection device in which a magnetic material is disposed in the vicinity of each of the plurality of magnetic field detection units.

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